ref.grace.8

Information:

(Basic Information)
http://www.webelements.com/webelements/elements/text/Ca/key.html
(History)
http://www.webelements.com/webelements/elements/text/Ca/hist.html
(Uses)
http://www.webelements.com/webelements/elements/text/Ca/uses.html
(Compound)
http://www.webelements.com/webelements/elements/text/Ca/comp.html
http://en.wikipedia.org/wiki/Calcium_carbonate

http://www.lenntech.com/Periodic-chart-elements/Ca-en.html

Picture:

(Sir Humphrey Davy)
http://cache.eb.com/eb/image?id=12396&rendTypeId=4
(Pure Calcium)
[[http://www.webelements.com/webelements/elements/text/Ca/key.html%3C/span%3E%3C/span|http://www.webelements.com/webelements/elements/text/Ca/key.html</span]]>
(Examples)

[[http://g-ec2.images-amazon.com/images/I/210HXPMSNTL.jpg%3C/span%3E%3Cspan|http://g-ec2.images-amazon.com/images/I/210HXPMSNTL.jpg<span]] style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt; mso-fareast-language: KO">
http://img.alibaba.com/photo/11236441/Grey_Portland_Cement.jpg
http://www.trinityminerals.com/ms2006/100_8361.jpg

http://www.webelements.com/webelements/elements/media/element-pics-theo/15_P_2.jpg